The combination of the influx of boomers in the RV market along with lower fuel prices and the improved economy have caused a not surprising boom in the RV industry as a whole. Sales are nearing historic highs, meaning of course, there are lots more RV'ers competing for the available campsites. The number of fulltime RV'ers though, appears to be remaining relatively stable. That's probably because fulltimers in general come mostly from the older generation, and the drop-outs due to death, disability, or other reasons likely pretty much match the number of new fulltimers on the other end of the scale. Many fulltimers spend longer terms at a given park rather than moving frequently, so I expect the impact in state and national parks with 14 day limits is minimal.